Authors:Saeed Ullah Jan, Fawad QayumFirst page: 6Abstract: Client-server computing is the analytical development of compatible programming with significant supposition and the detachment of a massive program into its fundamental parts ("modules"), which can create the chance for extra enhancement, inconsiderable improvement, and prominent maintainability. In client-server computing, total extensive modules don't need to be accomplished within the similar memory space totally but can execute independently on a suitable hardware and software platform according to their behavior. The user authentication is the dominant constraint for client-server computing that limits the illegitimate right of entry into the main workstation. This research is mainly focused on the design of a robust authentication scheme for client-server architecture computing. It carries some additional features like security, virtualization, user's programs security, individuality supervision, integrity, control access to server and authentication. The proposed background also delivers the characteristic supervision, mutual authentication, and establishment of secure session key among users and the remote server.PubDate: 2018-04-26DOI: 10.5539/nct.v3n1p6Issue No:Vol. 3, No. 1 (2018)

Authors:Ogunsanwo Gbenga Oyewole, Goga Nicholas, Awodele Oludele, Okolie SamuelFirst page: 26Abstract: The concept of noise appears during the process of gathering the image into digital form: that is when the image is being created and it may also be introduced when the image is being transmitted. The presence of the noise usually degraded the quality of the image. De noising algorithms were employed in order to advance the value of the image. This paper tries to compare linear and non linear filtering algorithm. This study adopted image processing techniques to process 600 images dataset acquired from 60 different signers using vision based method. The acquired images were de-noised using Gaussian filter and Median filter algorithms. The outcomes of the two de-noising algorithms were compared using Peak Signal to Noise Ratio (PSNR) and Mean Square Error (MSE). The results of processed images for de-noising algorithms show that Median filter had higher PSNR of 47.7 than the Gaussian filter of 31.79, and lower MSE of 1.11 than Gaussian filter of 43.4.It was also ascertained that de-noised images with non-linear median filter had better quality than images de-noised by linear Gaussian filter.PubDate: 2018-06-11DOI: 10.5539/nct.v3n1p26Issue No:Vol. 3, No. 1 (2018)

Authors:Arnold Adimabua Ojugo, D. O. OtakoreFirst page: 33Abstract: Usability is the focal point on which webometric is studied as it seeks to ascertain the experience and convenience level of users who interact with a web-based systems. It scores vital aspects of the website based on certain criteria. Thus, the website’s design, architecture and deployment must be poised to change, reshape and refocus a user’s image while satisfying the user’s search quest about the institution. Our study is an investigation of website usability based on some criteria that describes usability of academic websites with a focus on the Federal University of Petroleum Resources Effurun, Nigeria. Result shows the strengths and weaknesses (problems cum prospects) of the websites in relation to redesigning and improving the university website. Its major strength is in its content and architecture; While, the site struggled to ensure effective search, navigation, design and others. Findings suggest that the FUPRE websites is lacking in various usability areas.PubDate: 2018-07-02DOI: 10.5539/nct.v3n1p33Issue No:Vol. 3, No. 1 (2018)

Authors:Guohua Zhang, Zhen Li, Qiaoli ZhangFirst page: 1Abstract: With the progress of time, the power network has been the basis of economic development. However, people have little knowledge of the controllability of the power network. This article will study eight power networks and compare the controllability of the power network in many aspects.DOI: 10.5539/nct.v3n1p1Issue No:Vol. 3, No. 1